@font-face{font-family:'DM Sans';src:url('assets/fonts/dm-sans-600.ttf') format('truetype');font-weight:600;font-display:swap}
@font-face{font-family:'Libre Baskerville';src:url('assets/fonts/libre-baskerville-400.ttf') format('truetype');font-weight:400;font-display:swap}
:root{color-scheme:dark;--paper:#503C61;--ink:#FFF9F1;--muted:#D9CAE3;--line:#806A90;--accent:#FFC49C;--serif:'Libre Baskerville',Georgia,serif;--sans:'Libre Baskerville',Georgia,serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:14px/1.8 var(--sans);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration-thickness:1px;text-underline-offset:5px}a:hover{color:var(--accent)}a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:6px}.wrap{width:min(960px,calc(100% - 128px));margin:auto}.skip{position:absolute;left:20px;top:-100px;background:var(--paper);padding:12px;z-index:10}.skip:focus{top:12px}.topbar{min-height:94px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{font-size:15px;font-weight:400;text-decoration:none}.brand span{color:var(--muted);font-weight:400;margin-left:12px}nav{display:flex;gap:30px;font-size:13px}nav a{text-decoration:none;padding:8px 0;color:var(--muted)}nav a[aria-current=page]{color:var(--ink);border-bottom:1px solid var(--accent)}h1,h2,h3,p,figure{margin:0}h1{font:400 clamp(42px,4.8vw,58px)/1.14 var(--serif);letter-spacing:0}h2{font:400 25px/1.3 var(--serif);letter-spacing:-.015em}h3{font:400 22px/1.3 var(--serif)}p+p{margin-top:22px}.lede{font-size:17px;line-height:1.65;margin-top:30px;max-width:590px;letter-spacing:0}.hero{padding:60px 0 65px;display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}.hero img{width:100%;aspect-ratio:4/5;object-fit:cover;object-position:center bottom;border-radius:100px 4px 4px 4px}.hero .lede{max-width:430px}img{display:block;max-width:100%;height:auto}.caption,figcaption{font-size:12px;line-height:1.5;color:var(--muted);margin-top:12px}.essay-row{display:grid;grid-template-columns:220px 1fr;gap:48px;border-top:1px solid var(--line);padding:44px 0 50px}.prose{max-width:690px}.prose>figure{margin-top:28px}.prose>figure img{max-height:590px;object-fit:contain;margin:auto;border-radius:4px}.continuations{margin:28px 0 0;border-top:1px solid var(--line)}.continuations a{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:22px 0;border-bottom:1px solid var(--line);text-decoration:none;font-size:19px}.continuations small{font-size:13px;color:var(--muted);display:block;margin-top:4px}.arrow{font-size:27px;color:var(--accent)}footer{margin-top:46px;padding:26px 0 34px;border-top:1px solid var(--line);font-size:12px;color:var(--muted);display:flex;justify-content:space-between;gap:24px}.page-head{padding:60px 0 50px}.page-head h1{font-size:clamp(36px,4.5vw,52px)}.page-head .lede{max-width:650px;font-size:17px}.inline-link{display:inline-block;margin-top:22px;color:var(--accent)}
/* The diagram shows the physical light behavior; all controls are local. */
.lab{padding:30px 0 42px;margin-bottom:40px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.lab-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;margin-bottom:24px}.lab-head h2{font-size:27px}.lab-head span{font-size:12px;color:var(--muted)}.lab-layout{display:grid;grid-template-columns:1fr 1fr;gap:55px;align-items:center}.device{position:relative;max-width:460px;margin:auto}.device svg{display:block;width:100%;height:auto;overflow:visible}.device svg text{font-family:var(--sans);font-size:16px;fill:var(--ink)}.device svg .view-label{font-size:10px;letter-spacing:3px;fill:var(--muted)}.device-shadow{fill:#130b1b;filter:blur(12px)}.rim{fill:#aa8d77;stroke:#e1d1bf;stroke-width:1}.groove{fill:none;stroke:#b9a797;stroke-width:1;opacity:.65}.leader{fill:none;stroke:#ab96b3;stroke-width:1;opacity:.7}.light{--light:#b7ada5;transition:opacity .45s ease}.light .led{fill:var(--light);stroke:#ffffff60;stroke-width:1}.light .halo{fill:var(--light);filter:url(#glow);opacity:0}.slot1{--light:#377dff}.slot2{--light:#c15f70}.slot1 .halo,.slot2 .halo{opacity:.8}.owner{fill:#fdfbf2;stroke:#fff;stroke-width:1;filter:drop-shadow(0 0 7px #fff8d7)}.lab[data-scene=together] .slot1,.lab[data-scene=together] .slot2{--light:#c15f70}.lab[data-scene=private] .slot1{opacity:.28}.lab[data-scene=private] .slot1 .halo,.lab[data-scene=private] .slot2 .halo{opacity:0}.lab[data-scene=private] .slot2{--light:#b7ada5}.lab[data-playing=true]:not([data-scene=private]) .slot1,.lab[data-playing=true]:not([data-scene=private]) .slot2{animation:breathe 1.8s ease-in-out infinite}.lab[data-playing=true][data-scene=together] .slot1,.lab[data-playing=true][data-scene=together] .slot2{animation-duration:.8s}@keyframes breathe{0%,100%{opacity:.55}50%{opacity:1}}
@keyframes wave-sweep{0%,32%,100%{opacity:.18}8%,20%{opacity:1}}
.controls{display:flex;gap:0;border-bottom:1px solid var(--line);margin-bottom:28px}button{font:400 13px var(--sans);border:1px solid var(--line);background:transparent;color:var(--ink);padding:12px 16px;min-height:44px;cursor:pointer;border-radius:5px;transition:background .2s,color .2s}button:hover{background:#ffffff0d;border-color:var(--muted)}.controls button{border:0;border-bottom:2px solid transparent;border-radius:0;flex:1;padding:12px 8px;color:var(--muted)}.controls button[aria-pressed=true]{color:var(--accent);border-bottom-color:var(--accent)}#scene-title{margin-bottom:14px}#scene-copy{font-size:16px;min-height:109px;color:#e4d9e9}.readout{font-size:13px;margin:23px 0;padding:14px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.readout div+div{margin-top:6px}.demo-actions{display:flex;gap:10px}.wave-button{border-color:#9b6d56;color:var(--accent)}.device-note{text-align:center;font-size:11px;color:var(--muted);margin-top:6px}button:disabled{cursor:default;color:var(--muted);opacity:.55}.section-intro{font-size:15px;color:var(--muted);margin-top:20px;max-width:220px}.app-detail{display:grid;grid-template-columns:1fr .9fr;gap:32px;align-items:center}.phone-shot{width:100%;max-width:300px}.phone-shot img{border-radius:23px;border:1px solid #75647c;box-shadow:0 24px 55px #10061960}.app-copy{font-size:14px}.app-copy .inline-link{font-size:14px}.flow,.feedback-loop{list-style:none;margin:28px 0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.flow li,.feedback-loop li{padding:20px 16px 20px 0;font-size:13px;color:var(--muted);line-height:1.5}.flow li+li,.feedback-loop li+li{border-left:1px solid var(--line);padding-left:16px}.flow strong,.feedback-loop strong{display:block;font-size:15px;margin-bottom:8px;color:var(--ink);font-weight:600}.feedback-loop span{display:block;font-size:11px;color:var(--accent);margin-bottom:10px;text-transform:uppercase;letter-spacing:.08em}
@media(max-width:850px){.wrap{width:calc(100% - 80px)}.hero{gap:30px}.hero h1{font-size:48px}.hero .lede{font-size:17px}.essay-row{grid-template-columns:210px 1fr;gap:30px}.app-detail{grid-template-columns:1fr}.app-copy{max-width:440px}.lab-layout{gap:24px}.controls button{font-size:12px}}
@media(max-width:620px){.wrap{width:calc(100% - 48px)}.topbar{align-items:flex-start;padding:22px 0 18px;flex-direction:column;gap:12px}.brand span{margin-left:10px}nav{gap:26px}.hero{grid-template-columns:1fr;gap:32px;padding:38px 0 40px}.hero h1{font-size:42px}.hero .lede{font-size:17px;margin-top:20px;max-width:360px}.hero figure{width:100%;max-width:470px}.hero img{max-height:520px;border-radius:64px 4px 4px 4px}.essay-row{grid-template-columns:1fr;gap:24px;padding:32px 0 36px}.essay-row h2{font-size:25px}.lede{font-size:20px}.lab-layout{grid-template-columns:1fr;gap:28px}.lab-head{display:block}.lab-head span{display:block;margin-top:8px}.device{max-width:360px}.page-head{padding:38px 0 34px}.page-head .lede{font-size:17px}.flow,.feedback-loop{grid-template-columns:1fr}.flow li+li,.feedback-loop li+li{border-left:0;border-top:1px solid var(--line);padding-left:0}.continuations a{font-size:18px}footer{flex-direction:column;gap:8px}#scene-copy{min-height:0}.app-detail{grid-template-columns:1fr;gap:26px}.phone-shot{max-width:310px;margin:auto}.section-intro{max-width:none;margin-top:12px}.controls button{font-size:13px}.demo-actions button{flex:1}.lab{margin-bottom:24px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}.lab:not([data-playing=true]):not([data-waving=true]) .light{animation:none!important}}
@media print{:root{--paper:white;--ink:#201628;--muted:#5e5665;--line:#aaa;--accent:#784027;color-scheme:light}body{font-size:11pt}.wrap{width:100%}nav,.skip,.controls,.demo-actions{display:none}.hero{padding:24px 0}.hero h1{font-size:50pt}.hero img{max-height:300px;object-fit:contain}.lede{font-size:15pt}.essay-row{padding:20px 0;break-inside:avoid}.phone-shot{max-width:200px}h2{font-size:25pt}}

.breadcrumbs{display:flex;align-items:baseline;gap:14px;font-size:14px;color:var(--muted)}.breadcrumbs a{text-decoration:none}.breadcrumbs .brand{color:var(--ink)}

.breadcrumbs .brand{font:400 22px/1.2 Georgia,'Times New Roman',serif}
.breadcrumbs .brand span{margin:0;color:inherit}

/* Recreated app view shares local demo state with the physical button. */
.beacon-button{position:absolute;left:50%;top:56.818%;transform:translate(-50%,-50%);width:10%;aspect-ratio:1;min-width:44px;min-height:44px;padding:0;border:0;border-radius:50%;background:transparent}
.beacon-button:hover{background:#fff3;box-shadow:0 0 0 5px #fff2}
.beacon-button:active{background:#38211440}
.beacon-button:focus-visible{outline:2px solid var(--ink);outline-offset:5px}
.lab[data-owner-available=false] .owner{fill:#b7ada5;stroke:#ffffff60;filter:none}
.owner-feedback{text-align:center;font-size:13px;color:var(--ink);margin-top:8px}
.app-mock{width:100%;max-width:330px;margin:auto}
.app-mock figcaption{text-align:center}
.mock-screen{color-scheme:dark;background:#191919;border:1px solid #363336;border-radius:24px;padding:25px 22px;box-shadow:0 20px 45px #160c202e;color:#ededed;font:14px/1.45 Arial,sans-serif}
.mock-title{font-size:22px;font-weight:700;letter-spacing:-.6px}
.mock-account{color:#999;font-size:13px;margin:3px 0 22px}
.mock-account strong{color:#ddd}
.mock-label{font-size:11px;letter-spacing:.7px;color:#aaa;margin-bottom:10px}
.mock-status{display:flex;background:#101010;border:1px solid #303030;border-radius:8px;padding:3px;gap:3px}
.mock-status button{flex:1;font:600 12px Arial,sans-serif;color:#888;border:0;border-radius:5px;padding:8px 4px;min-height:38px;white-space:nowrap}
.mock-status button[aria-pressed=true]{background:#282828;color:#fff;box-shadow:0 0 0 1px #353535}
.mock-status button span{font-size:16px;vertical-align:-1px;margin-right:3px}
.mock-tabs{display:flex;gap:4px;padding:3px;border:1px solid #303030;border-radius:7px;margin-top:25px;font-size:12px;font-weight:600;color:#888}
.mock-tabs>span{flex:1;text-align:center;padding:5px}
.mock-tabs>span:first-child{background:#282828;border-radius:4px;color:#eee}
.mock-tabs small{background:#393939;border-radius:9px;padding:1px 4px;margin-left:4px}
.mock-friends{padding:18px 3px 20px;min-height:148px}
.mock-friend{display:flex;align-items:center;gap:7px;min-height:42px;font-size:13px}
.mock-friend[hidden]{display:none}
.mock-slot{font-size:11px;color:#666;width:9px}
.mock-friend strong{font-weight:400}
.mock-dot{width:12px;height:12px;flex-shrink:0;border-radius:50%}
.mock-bea{background:#377dff}.mock-cato{background:#c15f70}
.mock-friend-status{margin-left:auto;color:#aaa;font-size:11px}
.mock-empty{font-size:11px;color:#666;margin-top:10px;padding-left:2px}
.mock-own-status{font-size:11px;color:#999;border-top:1px solid #303030;padding-top:16px}
.lab[data-scene=together] .mock-bea{background:#c15f70}
.lab[data-scene=private] .mock-bea{background:transparent;border:1px solid #377dff;opacity:.5}
.lab-summary{max-width:760px;margin:34px auto 0}
.lab-summary #scene-copy{min-height:0}
.lab-summary .demo-actions{margin-top:22px}
@media(max-width:620px){.lab-layout{gap:32px}.app-mock{max-width:330px}.lab-summary{margin-top:30px}.mock-status button{min-height:44px}}
/* Keep the demo controls in the app, with explanations beside the beacon. */
.demo-intro{max-width:690px;color:var(--muted);font-size:14px;margin-bottom:35px}
.lab-layout{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);align-items:start;gap:48px}
.lab-summary{margin-top:28px}.lab-summary h3{font-size:22px}.lab-summary #scene-copy{font-size:14px;line-height:1.8;min-height:108px}
.lab-layout>.demo-actions,.lab-layout>div>.demo-actions{margin-top:22px}
.app-mock{max-width:410px}.mock-screen{padding:30px 25px;border-radius:24px;font:14px/1.5 Arial,sans-serif}
.mock-title{font-size:23px}.mock-account{font-size:13px;margin:4px 0 26px}.mock-label{font-size:12px;margin-bottom:12px}
.mock-status button{font-size:13px;min-height:44px}.mock-status button span{font-size:19px}
.mock-tabs{margin-top:30px;position:relative;padding:4px;gap:5px}
.mock-tabs::before{content:'';position:absolute;top:-16px;left:0;right:0;border-top:1px solid #303030}
.mock-tabs button{flex:1;min-height:38px;border:0;border-radius:5px;font:600 13px Arial,sans-serif;padding:6px;color:#888}
.mock-tabs button[aria-pressed=true]{background:#282828;color:#eee}
.mock-tabs small{font-size:11px}
.mock-friends{padding:18px 0 22px;min-height:0}
.mock-screen button{font-family:Arial,sans-serif}
.mock-friend{gap:8px;min-height:52px;font-size:14px}
.mock-slot{width:13px;font-size:12px;flex-shrink:0}
.mock-dot{background:var(--buddy-color);border:0;width:14px;height:14px;min-height:14px;padding:0;flex-shrink:0;position:relative;overflow:visible}
.mock-dot::before{content:'';position:absolute;inset:-10px}
.mock-dot:hover{background:var(--buddy-color);outline:3px solid #ffffff40}
.mock-friend strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}
.mock-friend-status{font:13px Arial,sans-serif;color:#999;border:0;min-height:36px;padding:5px 0;background:none;white-space:nowrap}
.mock-friend-status:hover{background:none;color:#fff;text-decoration:underline}
.mock-friend-status:disabled{opacity:1;color:#999;text-decoration:none}
.mock-wave{border:1px solid #444;background:#252525;min-width:34px;min-height:36px;padding:5px;border-radius:7px;font-size:17px;line-height:1}
.mock-remove{border:0;color:#777;min-height:36px;padding:5px 0;min-width:18px;font-size:19px;line-height:1}
.mock-empty{display:flex;gap:13px;width:100%;border:0;text-align:left;color:#555;font-size:14px;min-height:44px;padding:6px 0;margin:0}
.mock-empty span{font-size:12px;width:13px;line-height:24px}




.mock-heading{display:flex;align-items:center;justify-content:space-between;color:#ddd;min-height:52px;font-size:16px}
.mock-heading button{font-size:22px;min-height:36px;padding:4px 9px;border:0;color:#888}
.mock-privacy-intro{color:#aaa;font-size:12px;margin-top:20px}
.mock-sharing{display:flex;align-items:center;gap:8px;min-height:58px;font-size:13px}
.mock-sharing strong{font-weight:400}.mock-sharing span{color:#999;margin-left:auto;font-size:12px}
.mock-sharing button{font-size:12px;min-height:36px;padding:5px 8px;color:#bbb;border-color:#444}
.mock-palette{display:flex;gap:14px;margin:5px 0 15px 25px}
.mock-palette button{background:var(--buddy-color);width:28px;height:28px;min-height:28px;border-radius:50%;padding:0;border:2px solid transparent}
.mock-palette button[aria-pressed=true]{border-color:white}
.mock-screen [hidden]{display:none!important}
.light.occupied .halo{opacity:.8}
.lab[data-playing=true] .light.available .led,.lab[data-playing=true] .light.available .halo{animation:breathe 1.8s ease-in-out infinite}
.owner{fill:var(--owner-color,#fdfbf2)}
.lab[data-playing=true] .light.gathering .led,.lab[data-playing=true] .light.gathering .halo,.lab[data-playing=true] .owner.gathering{animation:breathe .8s ease-in-out infinite}

@media(max-width:850px){.lab-layout{gap:28px}.mock-screen{padding:24px 18px}.mock-friend{gap:6px}.mock-friend-status{font-size:12px}.mock-title{font-size:23px}}
@media(max-width:620px){.lab-layout{grid-template-columns:1fr}.app-mock{max-width:390px}.lab-summary #scene-copy{min-height:0}.mock-friend-status,.mock-wave,.mock-remove{min-height:44px}.mock-wave{min-width:38px}.mock-tabs button{min-height:44px}}

.mock-dropdown{margin:0 0 10px 25px;padding:5px;background:#222;border:1px solid #3b3b3b;border-radius:7px}
.mock-dropdown button{display:block;width:100%;text-align:left;border:0;padding:10px 12px;color:#ddd;font-size:14px;min-height:44px}
.mock-dropdown button:hover{background:#333}
.mock-dropdown p{font-size:12px;color:#999;padding:10px}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.light.busy .led{opacity:.65}.light.busy .halo{opacity:0}
.mock-dot-busy{background:transparent;border:1px solid var(--buddy-color)}
.mock-dot-busy::after{content:'';position:absolute;left:0;top:5px;width:12px;border-top:1px solid var(--buddy-color);transform:rotate(-45deg)}
.button-callout{pointer-events:none}.button-callout rect{fill:#6C567D;stroke:var(--line);stroke-width:1}.device svg .button-callout text{font-size:12px;fill:var(--ink)}.button-callout path{fill:none;stroke:var(--ink);stroke-width:1.2}
.lab[data-waving=true] .button-callout{visibility:hidden}

.interaction-head .lede{max-width:none}
.led-outline{fill:none;stroke:#b19b85;stroke-width:1.2;opacity:1}
.lab[data-waving=true] .light{--light:var(--wave-color,#F2A653)}
.lab[data-waving=true] .light .led,.lab[data-waving=true] .light .halo{animation:wave-sweep .9s linear 1!important;animation-delay:calc(var(--i) * .15s)!important}
.mock-details{margin-top:18px}.mock-details label{display:block;font-size:12px;color:#999;margin-bottom:7px}
.mock-input-row{display:flex;gap:7px}.mock-input-row input{min-width:0;flex:1}
.mock-details input,.mock-details select{font:13px Arial,sans-serif;color:#ddd;background:#111;border:1px solid #383838;border-radius:5px;padding:9px;min-height:38px}
.mock-details input:focus-visible,.mock-details select:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.mock-details button{font-size:12px;padding:6px 11px;border-color:#444;min-height:36px;color:#bbb}
.mock-details .mock-add-time{border:0;padding:12px 0;color:#999;text-align:left}
.mock-until-header{display:flex;align-items:center;justify-content:space-between;margin-top:10px}.mock-until-header label{margin:0}.mock-until-header button{border:0;font-size:19px;padding:0 6px}
.mock-time-selects{display:grid;grid-template-columns:.8fr .8fr 1fr 1.5fr;gap:5px}.mock-time-selects select{width:100%;min-width:0;padding:7px 3px}
#save-end-time{margin-top:9px}.mock-time-error{font-size:12px;color:#f8aba2;margin-top:8px}
@media(max-width:620px){.mock-details input,.mock-details select{font-size:16px;min-height:44px}.mock-details button{min-height:44px}}

/* Friend actions live outside the app because only that friend can choose a visit. */
.visit-scenarios{margin-top:26px;padding-top:22px;border-top:1px solid var(--line)}
.visit-scenarios h3{font-size:17px;margin-bottom:12px}
.visit-buttons{display:flex;flex-wrap:wrap;gap:8px}
.visit-buttons button{font-size:12px;padding:10px 12px}
.visit-buttons button[aria-pressed=true]{color:var(--ink);background:#ffffff18;border-color:var(--accent)}
.visit-scenarios p{font-size:12px;color:var(--muted);line-height:1.6;margin-top:12px}
.mock-come-by{color:var(--buddy-color);border:1px solid var(--buddy-color);border-radius:6px;padding:5px 7px;background:color-mix(in srgb,var(--buddy-color) 15%,transparent)}
.mock-come-by:hover{background:color-mix(in srgb,var(--buddy-color) 25%,transparent);text-decoration:none}